Schedule of Components of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Current Provision (Benefit) - Federal	$ 87,626	$ 67,913	$ (91,304)
Current Provision (Benefit) - State	6,924	9,587	3,004
Current Provision (Benefit) - Total	94,550	77,500	(88,300)
Deferred Provision (Benefit) - Federal	3,491	7,207	108,467
Deferred Provision (Benefit) - State	2,806	5,239	4,337
Deferred Provision (Benefit) - Total	6,297	12,446	112,804
Provision for Income Taxes	$ 100,847	$ 89,946	$ 24,504